78554871 has 24 divisors (see below), whose sum is σ = 115998480. Its totient is φ = 51216000.

The previous prime is 78554863. The next prime is 78554891. The reversal of 78554871 is 17845587.

It is a happy number.

It is not a de Polignac number, because 78554871 - 2³ = 78554863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78554891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80416 + ... + 81386.

It is an arithmetic number, because the mean of its divisors is an integer number (4833270).

Almost surely, 2^78554871 is an apocalyptic number.

78554871 is a deficient number, since it is larger than the sum of its proper divisors (37443609).

78554871 is a wasteful number, since it uses less digits than its factorization.

78554871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1164 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 78554871 is about 8863.1185820793. The cubic root of 78554871 is about 428.2766266417.

The spelling of 78554871 in words is "seventy-eight million, five hundred fifty-four thousand, eight hundred seventy-one".